Morphologies and kinetics of a dewetting ultrathin solid film

Details Morphologies and kinetics of a dewetting ultrathin solid film Morphologies and kinetics of a dewetting ultrathin solid film

2008-04-11

arxiv.org/abs/0804.1816v1

Physics

Condensed Matter

Materials Science

Scientific paper

10.1103/PhysRevB.77.245445

The surface evolution model based on geometric partial differential equation is used to numerically study the kinetics of dewetting and dynamic morphologies for the localized pinhole defect in the surface of the ultrathin solid film with the strongly anisotropic surface energy. Depending on parameters such as the initial depth and width of the pinole, the strength of the attractive substrate potential and the strength of the surface energy anisotropy, the pinhole may either extend to the substrate and thus rupture the film, or evolve to the quasiequilibrium shape while the rest of the film surface undergoes phase separation into a hill-and-valley structure followed by coarsening. Overhanging (non-graph) morphologies are possible for deep, narrow (slit-like) pinholes.

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